Update plugin com.diffplug.spotless to v8.1.0

Author: renovate[bot]

java/build.gradle.kts

@@ -4,7 +4,7 @@
 import net.ltgt.gradle.errorprone.errorprone
 
 plugins {
-    id("com.diffplug.spotless") version "8.0.0"
+    id("com.diffplug.spotless") version "8.1.0"
     id("com.palantir.consistent-versions") version "3.7.0"
     id("com.palantir.git-version") version "4.2.0"
     id("net.ltgt.errorprone") version "4.3.0" apply false